The boards here don't share a toolchain with each other, or with the main three. Teensy, Adafruit's SAMD line, STM32 Nucleo, and the micro:bit ecosystem each pull in a separate workflow — know which one you need before browsing specs.
Specialists: Teensy for high-clock audio and USB, Adafruit SAMD boards running CircuitPython or the Arduino IDE, proper STM32 eval kits, and the micro:bit classroom ecosystem. Schematik builds target ESP32, Arduino Uno, and Pico; come here when you have a specific reason to.
